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ELECTRIC CIRCUIT

ELECTRIC CIRCUIT. VISUAL INSPECTIONS. COURSE OBJECTIVES. DISCUSSION AND REVIEW OF ELECTRICAL INSPECTION TECHNIQUES AND METHODS. REVIEW FILES. VIOLATION HISTORY PREVIOUS INSPECTIONS INPUT FROM PREVIOUS INSPECTOR. VISUAL OBSERVATIONS AT THE MINE. POWER LINES GEN SET PLANT RUNNING OR NOT.

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ELECTRIC CIRCUIT

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  1. ELECTRIC CIRCUIT VISUAL INSPECTIONS

  2. COURSE OBJECTIVES DISCUSSION AND REVIEW OF ELECTRICAL INSPECTION TECHNIQUES AND METHODS

  3. REVIEW FILES VIOLATION HISTORY PREVIOUS INSPECTIONS INPUT FROM PREVIOUS INSPECTOR

  4. VISUAL OBSERVATIONS AT THE MINE • POWER LINES • GEN SET • PLANT RUNNING OR NOT

  5. PRE-INSPECTION CONFERENCE • REVIEW (12028) • DISCUSS TEST METHODS • MAINTAINENCE PROCEDURES

  6. INSPECTION PROCEDURES • SELECT A STARTING POINT • PIT • MILL • PLANT

  7. PRIMARY CRUSHER • LOOKING AT DUMP POINT • GUARDS • SAFE ACCESS • OPERATORS BOOTH

  8. ELECTRICAL ITEMS • CABLE SIZE • CABLE CONDITIONS • CABLE CONNECTORS ? • STRAIN RELIEF ? • MOTORS (SIZE, MECHANICAL CONDITION, LOCATION

  9. A-PROCEED TO THE MCC TO GATHER ELECTRICAL INFORMATION IF POSSIBLE • INDICATOR LIGHTS BEING USED ? • WHAT ARE THE STARTER TYPES? • WHAT CONDITION ARE THEY IN? • HOUSKEEPING • FUSES LAYING AROUND, ETC.

  10. 430-61,62 NEC 430-152 NEC 430-52 430-28 430-81 430-98 430-101, 113 430-31,44 430-21-29 400-5A,B TABLES 310 430-21,29 430-51,58, TABLE 431-152

  11. MOTOR BRANCH CIRCUIT /SHORT CIRCUIT AND GROUND FAULT PROTECTION • RATING OR SETTING FOR INDIVIDUAL MOTOR CIRCUITS • NEC 430-152, ALSO REFER TO 430-52

  12. DATE___/____/______ I.D. #_______________ EVENT #___________ POWER SUPPLY

  13. CHECK MOTOR CONTROLLERS NEC 430-81,98

  14. FUSES OR CB RATINGS NEC 430-51,58 TABLE 152

  15. DISCONNECTING MEANS? NEC 430-101,113

  16. MOTOR BRANCH CIRCUIT CONDUCTORS • NEC 430-21 THRU 29

  17. TAP CONDUCTORS • NEC 430-28

  18. FEEDER CONDUCTORS • NEC 430-61, 62

  19. C-GENERATOR SIZE

  20. NAMEPLATE DATA • NEC 445-3

  21. SUBSTATION INSPECTIONS

  22. ELECTRICAL ITEMS TO LOOK AT • LOCKS • SIGNS • FENCE CONDITION & HEIGHT • GROUNDING • HOUSEKEEPING • PERSONNEL AUTHORIZED TO ENTER • HOW OFTEN DO THEY ENTER

  23. SUBSTATION CHECKS • CHECK FOR OBVIOUS HAZARDS BEFORE ENTERING • LOOSE OR BROKEN SUPPORTS • LOOSE CONDUCTORS • DRY VEGETATION WITHIN 25 FOOT • FIRE EXTINGUISHERS

  24. CHECK TRANSFORMER CONNECTIONS PRIMARY - CONFIGURATION ? SECONDARY- CONFIGURATION WYE---------DELTA ?

  25. OTHER PROTECTIVE DEVICES

  26. OTHER ELECTRICAL INSPECTION ITEMS • BUSHINGS/STRAIN RELIEFS • 1-CORDS (EXTENSION, LIGHT, WELDER LEADS) • LABELING • COVERS MISSING

  27. EXITS IN ROOMS • Clearance around panels • PARTS TRAILERS

  28. OUTDOOR EQUIPMENT HEATER PLUG-INS

  29. CHECK ILLUMINATION • MAY BE EVENING SHIFTS AT SOME OPERATIONS • TO INCLUDE ALL WORKING AREAS

  30. REVIEW LOCK OUT/TAG OUT PROCEDURES

  31. ELECTRICAL VIOLATION HISTORY 2000M/NM ONLY • 63,624 TOTAL VIOLATIONS ISSUED • 9,516 VIOLATIONS ISSUED (SURFACE) • 1,157 VIOLATIONS ISSUED (UG)

  32. ELECTRICAL VIOLATION HISTORY 2001M/NM ONLY • 54,837 TOTAL VIOLATIONS ISSUED • 8,263 VIOLATIONS ISSUED (SURFACE) • 719 ISSUED (UG)

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